Suppose White invades in answer to .
This occurred in a game Yi Sang-hun-Kim Mansu (B) 1995-05-01.
It also was seen in the recent game O Rissei-Alexandre Dinerchtein (B).
Black takes the bulge point
It is expected that Black will play , as in that game, for the sake of good shape.
Now the game from 1995 had White next at a. What was played by Dinerstein was the move at b (which he said in his commentary had been played by Yi Ch'ang-ho against Hane Naoki).
Clearly what happens next depends very much on the adjacent side positions.